1楼:干堩
(1)12.75-5
17+11 4
-1217
,=(12.75+11 4
)-(5
17+12
17),
=14-1,
=13;
(2)[1-(1 5
+0.3)]÷1 8
,=[1-0.5]÷1 8
,=0.5÷1 8
,=4;
(3)2 9
×40%+7 9
÷5 2
,=(2 9
+7 9
)×40%,
=1×40%,
=0.4;
(4)1.25×3.2×2.5,
=(1.25×8)×(0.4×2.5),
=10×1,
=10.
脱式计算.(能简算的要简算)(1)12.75-517+114-1217(2)[1-(15+0.3)]
2楼:手机用户
(1)12.75-5
17+11
4-1217,
=(12.75+11
4)-(5
17+12
17),
=14-1,
=13;
(2)[1-(1
5+0.3)]÷18,
=[1-0.5]÷18,
=0.5÷18,
=4;(3)2
9×40%+79÷5
2,=(29+79
)×40%,
=1×40%,
=0.4;
(4)1.25×3.2×2.5,
=(1.25×8)×(0.4×2.5),
=10×1,
=10.
脱式计算.(能简算的要简算)(19.75-14.25)÷1.1+52 &...
3楼:眼睛高贵
(1)(19.75-14.25)÷
bai1.1+52
=5.5÷1.1+52
=5+52
=57;du
(2)1.25×zhi7.3×0.8
=1.25×0.8×7.3
=1×7.3
=7.3;
(3)8.37×17.2-8.37×7.2=8.37×(dao17.2-7.2)
=8.37×10
=83.7;
(4)4.32×101-4.32
=4.32×(100-1)
=4.32×100
=432.
脱式计算.(能简算的要简算)(1)143+3038686+90909434343+131313868686(2)6.75?2.75÷[10×(9.75?41
4楼:次纲毅
(1)1
43+303
8686
+90909
434343
+131313
868686,=1
43+3×101
86×101
+9×10101
43×10101
+13×10101
86×10101,=1
43+3
86+9
43+1386,
=(143
+943
)+(3
86+13
86),
=1043
+843
,=1843;
(2)6.75-2.75÷[10×(9.75-414)],
=6.75-2.75÷[10×(9.75-4.25)],=6.75-2.75÷[10×5.5],
=6.75-2.75÷55,
=6.75-0.05,
=6.7;
(3)0.365×640+31
2×36.5+365×0.01,
=36.5×6.4+3.5×36.5+36.5×0.1,=36.5×(6.4+3.5+0.1),
=36.5×10,
=365.
150*50-25*5(脱式计算。)(能简算的要简算)
5楼:恒新国仪科技****
运用乘法的结合运算,可以得出以下结论:
150*50-25*5
=25*6*5*10-25*5
=25*5*(6*10-1)
=125*(60-1)
=125*59
=7375
6楼:瀛洲烟雨
=7500-125
=7375
直接算最简便
脱式计算(能简算的要简算)2.5×7.1×4 16.12×99+16.12 &nb...
7楼:手机用户
(1)2.5×
du7.1×4
=(2.5×zhi4)×
dao7.1
=10×专7.1
=71(2)16.12×99+16.12
=16.12×(
属99+1)
=16.12×100
=1612
(3)5.2×0.9+0.9×4.8
=(5.2+4.8)×0.9
=10×0.9
=9(4)26×15.7+15.7×24
=(26+24)×15.7
=50×15.7
=785
(5)(2.275+0.625)×0.28=2.9×0.28
=0.812
(6)64-2.64×0.5
=64-1.32
=62.68
脱式计算:能简算的要简算。,脱式计算:一、能简算的要简算。③4/7×5/9+3/7×5/9 = = = =
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