3.2×(1.25+0.25)巧算
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3.2×(1.25+0.25)巧算3.2×(1.25+0.25)巧算3.2×(1.25+0.25)巧算3.2×(1.25+0.25)=3.2×(5/4+1/4)=3.2×3/2=1.6×3=4.8=3
3.2×(1.25+0.25)巧算
3.2×(1.25+0.25)巧算
3.2×(1.25+0.25)巧算
3.2×(1.25+0.25)
=3.2×(5/4+1/4)
=3.2×3/2
=1.6×3
=4.8
=3.2×1.25+3.2×2.5
=0.4×(8×1.25)+0.8×(4×2.5)
=0.4×10+0.8×10
=4+8
=12
=4x0.25+0.8x1.25=1+1=2
3.2×(1.25+0.25)
=3.2×5/4+3.2×1/4
=3.2×3/2
=4.8
(1.25×8)×(0.25×0.4)
=10×0.1
=1
简便计算:
3.2×(1.25+0.25)
=3.2×1.25+3.2×0.25
=8×1.25×0.4+4×0.25×0.8
=10×0.4+1×0.8
=4+0.8
=4.8
(望采纳,谢谢)
3.2*(1.25+0.25)=4*0.8*1.25+0.8*4*0.25=4+0.8=4.8
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