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1. 直接写出得数。(每题 2★)
$131 + 98 + 69 = $ $5000 ÷ 125 ÷ 8 = $ $72 × 125 = $
$652 - 85 - 52 = $ $1400 ÷ (14 × 2) = $ $3000 ÷ 125 = $
$176 - 53 - 47 = $ $36 × 25 × 8 = $ $18 × 22 - 22 × 8 = $
$50 × 33 × 2 = $ $540 ÷ 20 ÷ 3 = $ $125 × (8 + 80) = $
$880 ÷ 5 ÷ 2 = $ $8 × 21 × 5 = $ $119 × 40 + 81 × 40 = $
$131 + 98 + 69 = $ $5000 ÷ 125 ÷ 8 = $ $72 × 125 = $
$652 - 85 - 52 = $ $1400 ÷ (14 × 2) = $ $3000 ÷ 125 = $
$176 - 53 - 47 = $ $36 × 25 × 8 = $ $18 × 22 - 22 × 8 = $
$50 × 33 × 2 = $ $540 ÷ 20 ÷ 3 = $ $125 × (8 + 80) = $
$880 ÷ 5 ÷ 2 = $ $8 × 21 × 5 = $ $119 × 40 + 81 × 40 = $
答案
298 5 9000 515 50 24 76 7200 220 3300 9 11000 88 840 8000
2. 计算下面各题,怎样简便就怎样算。(每题 3★)
$121 + 99 + 79$ $375 - 163 - 137$ $6800 ÷ 17 ÷ 4$
$65 × 104$ $790 ÷ (5 × 79)$ $99 × 11 + 99 × 88 + 99$
$698 - (298 - 59)$ $125 × 64 × 25$ $37 × 62 + 37 × 39 - 37$
$121 + 99 + 79$ $375 - 163 - 137$ $6800 ÷ 17 ÷ 4$
$65 × 104$ $790 ÷ (5 × 79)$ $99 × 11 + 99 × 88 + 99$
$698 - (298 - 59)$ $125 × 64 × 25$ $37 × 62 + 37 × 39 - 37$
答案
299 75 100 6760 2 9900 459 200000 3700
