小学数学五年级上册简便计算68道题含答案.docx
- 文档编号:25995949
- 上传时间:2023-06-17
- 格式:DOCX
- 页数:8
- 大小:17.53KB
小学数学五年级上册简便计算68道题含答案.docx
《小学数学五年级上册简便计算68道题含答案.docx》由会员分享,可在线阅读,更多相关《小学数学五年级上册简便计算68道题含答案.docx(8页珍藏版)》请在冰豆网上搜索。
小学数学五年级上册简便计算68道题含答案
小学数学五年级上册简便计算68道题(含详细答案)
3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5
7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)
3.29+0.73-2.29+2.27 3.29×0.25×40.125×8.8
0.25×0.28 0.125×3.2×2.5 35×10.2 0.25×4÷0.25×4
3.5×9.9 3.5×99+3.5
3.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.73
3.5×2.7-3.5×0.7 (32+5.6)÷0.8 3.5÷0.6-0.5÷0.6
4.9÷1.4 7÷0.25÷4 7÷0.125
7.35÷(7.35×0.25) 7.35÷(7.35÷0.25)
3.07-0.38-1.62 1.29+3.7+2.71+6.3
8-2.45-1.553.25+1.79-0.59+1.75
23.4-0.8-13.4-7.2 0.32×403
3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36
12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4
7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4
1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35
0.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6
(4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×102
14-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5
(2.5-0.25)×0.4 9.16×1.5-0.5×9.16
3.6-3.6×0.54.5÷1.8 930÷0.6÷5
63.4÷2.5÷0.4 4.25÷2.5×9.9+0.17
3.9÷(1.3×5) (7.7+1.54)÷0.7
2.5×2.4 2.7÷45
0.35×1.25×2×0.8 32.4×0.9+0.1×32.4
15÷0.2515÷(0.15×0.4)
小学数学五年级上册简便计算练习(答案卷)
一、归类练习:
3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5
=3.29+(0.73+2.27) =3.29-(0.73+2.27) =(7.5-7.5)+(2.5+2.5)
=3.29+3 =3.29-3 =0+5
=6.29=0.29=5
(加法结合律)(减法的性质)(同级运算交换)
7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)
=7.325-3.325-3.29 =7.325-5.325-1.7 =7.325-5.325+1.7
=4-3.29 =2-1.7 =2+1.7
=0.71=0.3=3.7
(减法交换)(减法的性质)(前面减号,脱括号变符号)
3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8
=(3.29-2.29)+(0.73+2.27) =3.29×(0.25×4) =0.125×8×1.1
=1+3 =3.29×1 =1×1.1
=4=3.29=1.1
(同级运算交换)(乘法结合律)(先拆数,乘法结合律)
0.25×0.28 0.125×3.2×2.5 35×10.2
=0.25×4×0.07 =(0.125×8)×(0.4×2.5) =35×(10+0.2)
=1×0.07 =1×1 =35×10+35×0.2
=0.07=1=350+7
(先拆数,乘法结合律)(拆数,乘法结合律)=357
(拆数,乘法分配律)
0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5
=(0.25÷0.25)×(4×4) =3.5×(10-0.1) =3.5×(99+1)
=1×16=3.5×10-3.5×0.1=3.5×100
=16=35-0.35=350
(同级运算交换)=34.65(乘法分配律)
(拆数,乘法分配律)
3.5×101-3.5 3.5×9.9+3.5×0.1 ★3.5×2.7+35×0.73
=3.5×(101-1) =3.5×(9.9+0.1) =3.5×2.7+3.5×7.3
=3.5×100=3.5×10=3.5×(2.7+7.3)
=350=35=3.5×10
(乘法分配律)(乘法分配律)=35
(先利用积不变的规律转化,
然后再用乘法分配律)
3.5×2.7-3.5×0.7 ★(32+5.6)÷0.8 ★3.5÷0.6-0.5÷0.6
=3.5×(2.7-0.7) =32÷0.8+5.6÷0.8 =(3.5-0.5)÷0.6
=3.5×2=40+7=3÷0.6
=7=47=5
(乘法分配律)(后2题类似分配律,但只适用于(a+b)÷c
和(a-b)÷c,而a÷(b+c)和a÷(b-c)不能用。
)
4.9÷1.4 7÷0.25÷4 ★ 7÷0.125
=4.9÷(7×0.2) =7÷(0.25×4) =7×8
=4.9÷7÷0.2=7÷1=56
=0.7÷0.2=7(乘除法转化规律,转化时
=3.5符号相反,转化前后的2数
(拆数,除法的性质)(除法的性质)相乘得1。
)
7.35÷(7.35×0.25) ★7.35÷(7.35÷0.25)
=7.35÷7.35÷0.25 =7.35÷7.35×0.25
=1÷0.25=1×0.25
=4=0.25
(除法的性质)(前面是除号,脱括号符号相反)
二、混合练习:
3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55
=3.07-(0.38+1.62) =(1.29+2.71)+(3.7+6.3) =8-(2.45+1.55)
=3.07-2=4+10=8-4
=1.07=14=4
(减法的性质)(加法交换律和加法结合律)(减法的性质)
3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32×403
=(3.25+1.75)+(1.79-0.59) =(23.4-13.4)-0.8-7.2 =0.32×(400+3)
=5+1.2=10-(0.8+7.2)=0.32×400+0.32×3
=6.2=10-8=128+0.96
(同级运算交换)=2=128.96
(减法交换和减法的性质)(拆数,乘法分配律)
3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.25×36
=(3.2+4.8)+(0.36+1.64) =(1.23-0.23)+(3.4+6.6) =0.25×4×9
=8+2=1+10=1×9
=10=11=9
(加法交换律和加法结合律)(同级运算交换)(拆数,乘法结合律)
12.7-(3.7+0.84) 36.54-1.76-4.54 0.25×0.73×4
=12.7-3.7-0.84 =36.54-4.54 -1.76 =0.25×4×0.73
=9-0.84=32-1.76=1×0.73
=8.14=30.24=0.73
(减法的性质)(减法交换)(乘法交换律和乘法结合律)
7.6×0.8+0.2×7.6 0.85×199 0.25×8.5×4
=7.6×(0.8+0.2) =0.85×(200-1) =0.25×4×8.5
=7.6×1 =0.85×200-0.85×1 =1×8.5
=7.6=170-0.85=8.5
(乘法分配律)=169.15(乘法交换律和乘法分配律)
(拆数,乘法分配律)
1.28×8.6+0.72×8.6 12.5×0.96×0.8 10.4-9.6×0.35
=(1.28+0.72)×8.6=12.5×0.8×0.96 =10.4-3.36
=2×8.6=10×0.96=7.04
=17.2=9.6(无简算)
(乘法分配律)(乘法交换律和乘法结合律)
0.8×(4.3×1.25) 3.12+3.12×99 28.6×101-28.6
=0.8×1.25×4.3 =3.12×(1+99) =28.6×(101-1)
=1×1.25 =3.12×100 =28.6×100
=1.25=312=2860
(乘法交换律和乘法结合律)(乘法分配律)(乘法分配律)
(4.23+6.17)×0.8 0.86×15.7-0.86×14.7 2.4×102
=10.4×0.8 =0.86×(15.7-14.7) =2.4×(100+2)
=8.32=0.86×1=2.4×100+2.4×2
(无简算)=0.86=240+4.8
(乘法分配律)=244.8
(拆数,乘法分配律)
14-7.32-2.68 2.64+8.67+7.36+11.33 2.31×1.2×0.5
=14-(7.32+2.68) =(2.64+7.36)+(8.67+11.33) =2.31×(1.2×0.5)
=14-10 =10+20 =2.31×0.6
=4=30=1.386
(减法的性质)(加法交换律和加法结合律)(乘法结合律)
(2.5-0.25)×0.4 9.16×1.5-0.5×9.16 3.6-3.6×0.5
=2.5×0.4-0.25×0.4 =9.16×(1.5-0.5) =3.6×(1-0.5)
=1-0.1 =9.16×1 =3.6×0.5(可转化成3.6÷2)
=0.9=9.16=1.8
(乘法分配律)(乘法分配律)(乘法分配律)
4.5÷1.8 930÷0.6÷563.4÷2.5÷0.4 ★ 4.25÷2.5×9.9+0.17
=4.5÷(9×0.2)=930÷(0.6×5)=63.4÷(2.5×0.4) =1.7×9.9+1.7×0.1
=4.5÷9÷0.2 =930÷3=63.4÷1 =1.7×(9.9+0.1)
=0.5÷0.2=310=63.4=1.7×10
=2.5(除法的性质)(除法的性质)=17
(拆数,除法的性质)(前半部分死算,后半部分利
用积不变的规律转化,最后用乘法分配律。
)
3.9÷(1.3×5) ★(7.7+1.54)÷0.7 2.5×2.4 2.7÷45
=3.9÷1.3÷5 =7.7÷0.7+1.54÷0.7 =2.5×4×0.6 =2.7÷(9×5)
=3÷5 =11+2.2 =10×0.6 =2.7÷9÷5
=0.6=13.2=6=0.3÷5
(除法的性质)(相当于分配律)(拆数,乘法结合律)=0.06
(拆数,除法的性质)
0.35×1.25×2×0.8 32.4×0.9+0.1×32.4 15÷0.2515÷(0.15×0.4)
=(0.35×2)×(1.25×0.8) =32.4×(0.9+0.1) =15÷(5×0.05)=15÷0.15÷0.4
=0.7×1 =32.4×1 =15÷5÷0.05=100÷0.4
=0.7=32.4=3÷0.05=250
(乘法交换律和乘法结合律)(乘法分配律)=60
(拆数,除法的性质)(除法的性质)
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 小学 数学 年级 上册 简便 计算 68 道题含 答案