丹阳市第八中学初一新生暑假数学作业(二)——3
信息发布者:20160628
一、
7.35 0 0.72 60
67.75 20.4 1.1 356.4
2 10 1/49 165
1 160 21 9/49
二、
(1)=1125-(1000-3)
=1125-1000+3
=128
(2)=1000-2+1246
=2246-2
=2244
(3)=13/3+17/3+3.2+6.8
=10+10
=20
(4)=62/5-12/5-9/7
=10-9/7
=61/7
(5)=400÷8÷125
=50÷125
=2/5
(6)=25×8×37
=200×37
=7400
(7)=1/4×12-1/6×12
=3-2
=1
(8)=7/4×4/7×34/15
=1×34/15
=34/15
(9)=34×2+34×13/34
=68+13
=81
(10)=125×(8+0.8)
=125×8+125×0.8
=1100
(11)=4.35+3.65+4.25+3.75
=8+8
=16
(12)=3.4×(99+1)
=3.4×100
=340
(13)=17.15-(8.47+1.53)
=17.15-10
=7.15
(14)=107/6-29/6-15/4
=13-15/4
=37/4
(15)=7/9×5/11+5/11×2/9
=(7/9+2/9)×5/11
=5/11
(16)=0.125×8×0.25×4
=1×1
=1
(17)=11/12×72+7/18×72+5/24×72
=66+28+15
=109
(18)=187.7×(11-1)
=187.7×10
=1877 |
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