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简介:
1)125 ×(17 × 8)× 4
= 125×8×4×17
=1000×68
=68000
2)13 × 99
=13×(100-1)
=1300-13
=1287
3)25x16x125
=25×2×8×125
=50000
4)375x480+6250x48
=480×(375+625)
=480000
5)210 ÷ 42 × 6
=210÷7÷6×6
=30
6)7900 ÷ 4 ÷ 25
=7900÷(4×25)
=79
7)150 × 40 ÷ 50
=150÷50×40
=3×40
=12
08)5600 ÷(25 ×7)
=56×100÷25÷7
=56÷7×100÷25
=32
9)39600 ÷ 25
=396×100÷25
=396×4
=1584
10)27000 ÷ 125
=27×1000÷125
=27×8