Question

简便运算

3 5/3×25 5/2 +37.9×6 5/2
48×1.08+1.2+56.8
36×1.09+1.2×67.3

Answer 1

友情提醒：你的分子分母写反了，因为分数线相当于除号，分数线/的右侧才是分母

（1）原式

=(3+3/5)×(25+2/5)+37.9×(6+2/5)
=3.6×25.4+37.9×6.4 
=3.6×25.4+(25.4+12.5)×6.4 
=3.6×25.4+25.4×6.4+12.5×6.4 
=3.6×25.4+25.4×6.4+12.5×8×0.8 
=25.4×(3.6+6.4)+100×0.8 
=254+80 
=334

（2）后面是乘吧

48×1.08+1.2×56.8 
=12×4×1.08+1.2×5.68×10
=12×4×1.08+12×5.68
=12×﹙4×1.08+5.68﹚
=12×﹙4.32+5.68﹚
=12×10
=120

（3）
36×1.09+1.2×67.3

=12×3×1.09+12×6.73
=12×(3×1.09+6.73)
=12×(3.27+6.73)
=12×10
=120

Answer 2

解：1. 3 5/3*25 5/2+37.9*6 5/2
=14/3*55/2+379/10*17/2
=770/6+6443/20
=7 700/60+19 329/60
=27 029/60
2.48*1.08+1.2+56.8
=51.84+1.2+56.8
=109.84
3.36*1.09+1.2*67.3
=1.2*（32.7+67.3）
=1.2*100
=120

Answer 3

0.125X0.25X64
=0.125×0.25×8×4×2
=0.125×8×﹙0.25×4×2﹚
=1×2
=2
7.8X36+7.8X74-7又5分之4X10
=7.8×﹙36＋74－10﹚
=7.8×100
=780
4.8X1/5+4.2÷5+1/5
=4.8×1/5＋4.2×1/5＋1/5
=1/5×﹙4.8＋4.2＋1﹚
=1/5×10
=2
9.3-3/2X10/21-2/7
= 9.3－5/7－2/7
=9.3－﹙5/7＋2/7﹚
=9.3－1
=8.3
这样可以么？

Answer 4

Answer 5