怎样计算简便就怎样算
[1]84/85×43
[2][8/17×3.17×9/17]÷3又17/100
[3]0.75×4又4/7+0.63×3又3/7+0.5×4又4/7+0.62×3又3/7
参考答案:[1]84/85×43
=42/85*86
=42/85*(85+1)
=42/85*85+42/85
=42+42/85
=42又42/85
[2][8/17×3.17×9/17]÷3又17/100
=(8/17*3。17*9/17)/3。17
=8/17*9/17
=72/289
[3]0.75×4又4/7+0.63×3又3/7+0.5×4又4/7+0.62×3又3/7
=4又4/7*(0。75+0。5)+3又3/7*(0。63+0。62)
=4又4/7*1。25+3又3/7*1。25
=1。25*(4+4/7+3+3/7)
=1。25*8
=10