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脱式计算.(能简算的要简算)(1)1.25×8.37×0.8 ...

(1)1.25×8.37×0.8 =1.25×0.8×8.37,=1×8.37,=8.37;(2)(9-2.35)×0.64=6.65×0.64,=4.256;(3)0.25×32×12.5=(0.25×4)×(8×1.25),=1×10,=10;(4)0.15×1999+0.15 =(1+1999)×0.15,=2000×0.15,=300;(5)0.37×1.4-0.4×0.37=(1....

44÷4又8分之5+37分之31÷111分之25+37分之36*4又25分之11=44÷8分之37+37分之31÷111分之25+37分之36*25分之111=44*37分之8+37分之31*25分之111+37分之36*25分之111=37分之352+25分之93+25分之108=37分之352+25分之201=925分之16237(3-112.5%+1又7...

37.8x0.9+3.78 =37.8x0.9+37.8x0.1 =37.8x(0.9+0.1) =37.8x1 =37.8

1.25×0.8×3.37 =1×3.37 =3.37

=8.37*(11+8+1) =8.37*20 =167.4

(1)12÷(25-23)×710,=12÷2×710,=6×710,=4260;(2)85×25+85×85-10×85,=85×(25+85-10),=25×100,=2500;(3)32×25×125,=8×4×25×125,=(8×125)×(4×25),=1000×100,=100000;(4)37.8×19-9×37.8,=(19-9)×37.8,=10×37.8,=3...

先乘后两位得1,再跟第一位相乘得37

37乘80加630乘8简便运算脱式 37*80+630*8 =37*80+63*80 =80*(37+63) =80*100 =8000

37.8-(7.8+2.5)脱式计算 =37.8-7.8-2.5 =30-2.5 =27.5

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