( 1 — 382+ — + — )×72 49 1 —÷ 59 + 7 —× 1 — 8 8599 —× 2 —÷ 9 —× 2 — 85851 — : x= 1 — : 0.9 3 7 2 —+ 1 —+ 1 —+ 7 — 383820%x- 30= 51x÷ 2 —= 5 — 36 2- 1 —+ 4 — 557 —+ 7 —+ 1 — 6964 —× 2 —× 5 — 5194
5 1 1 63÷0.02= — + — = — + — = 4 4 9 588-15= 17 8 7 590-160= — - — = 90% × — = 7 7 8 30×40= 2 1 1 1750÷50= — × — = — + — = 3 3 2 463-0.3= 6 10.6×0.8= 6 ÷ — = 4 ÷ — =5 29.2÷0.4= 4 6 88.15+0.76= — ÷ — = 3 + — = 3 5 79.7-0.29= 8 1 6 11.6×0.2= — × — = — + — = 9 5 7 53+0.28= 2436 ÷ 12 + 99 × 8 40%x + 20 = 75
2 + 5.5 + 8 + 4.5 250 × 0.32 × 0.125
10 : x = 40 : 2.3 3x + 0.5×8 = 6
( 1 — 6 8 2 + — + — )×90 5 9 1 — ÷ 46 + 1 — × 1 — 2 2 46 1 — × 4 — ÷ 1 — × 4 — 6 9 6 9 1 — : x = 1 — : 0.2 8 6 7 — + 1 — - 1 — + 2 — 8 3 8 3 32%x + 25 = 49 x - 9 — = 4 — 8 5 9 - 1 — - 8 — 9 9 3 — + 7 — - 1 — 2 8 2 2 — × 2 — × 3 — 3 11 2
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