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0.1×45×10×12=?用简便方法计算

8.45-0.45*0.1简便计算 8.45-0.45×0.1 =8.45-0.045 =8.405

65×10.1 =65×10+65×0.1 =650+6.5 =656.5

=3.14×10.1-3.14×0.1 =3.14×(10.1-0.1) =3.14×10 =31.4

56*10.1 =56*(10+0.1) =560+5.6 =565.6

10.1×87 =(10+0.1)×87 =10×87+0.1×87 =870+8.7 =878.7

(1)12.53-1.35×2-9.3,=12.53-2.7-9.3,=12.53-(2.7+9.3),=12.53-12,=0.53;(2)0.8÷(4-3.75)÷0.1,=0.8÷0.25÷0.1,=3.2÷0.1,=32;(3)45+1115+310,=2430+2230+930,=116;(4)7-(34-25),=7-720,=61320;(5)1112+58+38+112,...

(1)1+0.45÷0.9-78=1+0.5-0.875=1.5-0.875=0.625(2)2.5×25-0.12÷13+8.36=1-0.12×3+8.36=1-0.36+8.36=0.64+8.36=9(3)(712+58-1136)×72=712×72+58×72-1136×72=42+45-22=65(4)1.4+(38-0.25)÷114=1.4+(38-14)÷114=1.4+18×45=1.4+110=1....

=0.46x10.1-0.46x0.1=0.46x(10.1-0.1)=0.46x10=4.6 凑整加法 补数加法 调换位置的加法 两位减一位补数减法 多位数补数减法 调换位置的减法 多位数连减法

0.2×10.1- 0.2×0.1 =0.2×(10.1- 0.1) =0.2×10 =2

4.3×10.1 =4.3*(10+0.1) =4.3*10+4.3*0.1 =43+0.43 =43.43

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