Question

六年级脱式计算题题库（中括号的分数计算）

六年级脱式计算题题库（中括号的分数计算）
不要密密麻麻

Answer 1

3.2×42.3×3.75-12.5×0.423×16
=3.2×42.3×3.75-1.25×42.3×1.6
=42.3×(3.2×3.75-1.25×1.6)
=42.3×(4×0.8×3.75-1.25×4×0.4)
=42.3×(4×0.4×2×3.75-1.25×4×0.4)
=42.3×(4x0.4x7.5-1.25x4x0.4)
=42.3×[4×0.4×(7.5-1.25)]
=42.3×[4×0.4×6.25] 
=42.3×(4×2.5)
=4237 
1.8+18÷1.5-0.5×0.3 
=1.8+12-0.15
=13.8-0.15
=13.65
6.5×8+3.5×8-47 
=52+28-47
=80-47
(80-9.8)×5分之2-1.32 
=70.2X2/5-1.32
=28.08-1.32
=26.76
8×7分之4÷[1÷(3.2-2.95)]
=8×4/7÷[1÷0.25]
=8×4/7÷4
=8/7
2700×（506－499）÷900 
=2700×7÷900 
=18900÷900 
=21 
33.02－（148.4－90.85）÷2.5
=33.02－57.55÷2.5
=33.02－23.02 
=10
（1÷1－1）÷5.1 
=（1－1）÷5.1 
=0÷5.1 
=0
18.1＋（3－0.299÷0.23）×1
=18.1＋1.7×1 
=18.1＋1.7 
=19.8