四年级数学简便计算题:乘除基础
【精选习题】
1. 125 ×(17 ×8)×4
2. 25 ×16 ×125
3. 75000 ÷125 ÷15
4. 150 ×40 ÷50
5. 7900 ÷4 ÷25
6. 27000 ÷125
7. 210 ÷42 ×6
8. 56000 ÷(14000 ÷16)
9. 5600 ÷(25 ×7)
10. 13 ×99
【答案详解】
1. 125 ×(17 ×8)×4
= 125×8×4×17
=1000×68
=68000
2. 25 ×16 ×125
=25×2×8×125
=50000
3. 75000 ÷125 ÷15
=75×1000÷125÷15
=75÷15×1000÷125
=5×8
=40
4. 150 ×40 ÷50
=150÷50×40
=3×40
=120
5. 7900 ÷4 ÷25
=7900÷(4×25)
=79
6. 27000 ÷125
=27×1000÷125
=27×8
=216
7. 210 ÷42 ×6
=210÷7÷6×6
=30
8. 56000 ÷ (14000 ÷16)
=4×16
=64
9. 5600 ÷(25 ×7)
=56×100÷25÷7
=56÷7×100÷25
=32
10. 13 ×99
=13×(100-1)
=1300-13
=1287