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七十七乘七十八分之七十七1.2乘2.5乘3.5八分之一乘5.3减0.25加3.7除以80.75*67.5+3.1*7.5+1.5+四分之三9*3.75-十分之九+0,9*...
七十七乘七十八分之七十七 1.2乘2.5乘3.5 八分之一乘5.3减0.25加3.7除以8 0.75*67.5+3.1*7.5+1.5+四分之三 9*3.75-十分之九+0,9*63.5 三五分之十三-七分之四+三十五分之二十二-七分之三
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七十七乘七十八分之七十七
=(78-1)*77/78
=78*77/78-77/78
=77-77/78
=76又1/78
1.2乘2.5乘3.5
=(4*2.5)*(0.3*3.5)
=10*1.05
=10.5
八分之一乘5.3减0.25加3.7除以8
=(5.3+3.7 )*1/8-1/4
=10*1/8-1/4
=5/4-1/4
=1
0.75*67.5+3.1*7.5+1.5*四分之三
=0.75*(67.5+31+1.5)
=0.75*100
=75
9*3.75-十分之九+0,9*63.5
=0.9*(37.5-1+63.5)
=0.9*100
=90
三五分之十三-七分之四+三十五分之二十二-七分之三
=13/35+22/35-(4/7+3/7)
=1-1
=0
=(78-1)*77/78
=78*77/78-77/78
=77-77/78
=76又1/78
1.2乘2.5乘3.5
=(4*2.5)*(0.3*3.5)
=10*1.05
=10.5
八分之一乘5.3减0.25加3.7除以8
=(5.3+3.7 )*1/8-1/4
=10*1/8-1/4
=5/4-1/4
=1
0.75*67.5+3.1*7.5+1.5*四分之三
=0.75*(67.5+31+1.5)
=0.75*100
=75
9*3.75-十分之九+0,9*63.5
=0.9*(37.5-1+63.5)
=0.9*100
=90
三五分之十三-七分之四+三十五分之二十二-七分之三
=13/35+22/35-(4/7+3/7)
=1-1
=0
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1.25*2.5*3.25
简便运算
追答
1.25*2.5*3.2
=(1.25*0.8)*(2.5*4)
=1*10
=10
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简便运算
七十七乘七十八分之七十七
=77×(1-1/78)
=77-77/78
=76又1/78
1.2乘2.5乘3.5
=0.3×(4×2.5)×3.5
=0.3×10×3.5
=3×3.5
=10.5
八分之一乘5.3减0.25加3.7除以8
=1/8×(5.3-2+3.7)
=1/8×7
=7/8
0.75*67.5+3.1*7.5+1.5*四分之三
=0.75*67.5+31*0.75+1.5*0.75
=0.75*(67.5+31+1.5)
=0.75* 100
=75
9*3.75-十分之九+0,9*63.5
=0.9*37.5-0.9+0.9*63.5
=0.9*(37.5-1+63.5)
=0.9*100
=90
35分之十三-七分之四+三十五分之二十二-七分之三
=(13/35+22/35)-(4/7+3/7)
=1-1
=0
七十七乘七十八分之七十七
=77×(1-1/78)
=77-77/78
=76又1/78
1.2乘2.5乘3.5
=0.3×(4×2.5)×3.5
=0.3×10×3.5
=3×3.5
=10.5
八分之一乘5.3减0.25加3.7除以8
=1/8×(5.3-2+3.7)
=1/8×7
=7/8
0.75*67.5+3.1*7.5+1.5*四分之三
=0.75*67.5+31*0.75+1.5*0.75
=0.75*(67.5+31+1.5)
=0.75* 100
=75
9*3.75-十分之九+0,9*63.5
=0.9*37.5-0.9+0.9*63.5
=0.9*(37.5-1+63.5)
=0.9*100
=90
35分之十三-七分之四+三十五分之二十二-七分之三
=(13/35+22/35)-(4/7+3/7)
=1-1
=0
更多追问追答
追问
1.25*2.5*3.25
简便运算
追答
1.25*2.5*3.2
=(1.25*0.8)*(2.5*4)
=1*10
=10
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