( 2 — 583+ — + — )×10849 1 —÷ 49 + 7 —× 1 — 8 8493 —× 6 —÷ 3 —× 6 — 23237 — : x= 1 — : 0.2 6 3 8 —+ 1 —+ 1 —+ 6 — 9797 25%x- 19 = 57 x÷ 1 —= 6 — 57 6- 1 —+ 3 — 447 —+ 7 —+ 1 — 6261 —× 2 —× 2 — 2131
1 11 1 11.1-0.16= — ÷ — = — × — = 4 4 9 851-19= 11 4 1 820-170= — + — = 80% × — = 3 3 6 24×10= 6 6 1 1750÷30= — × — = — ÷ — = 7 7 2 458-0.4= 1 30.15×0.7= 4 × — = 8 - — =4 22.8÷0.2= 5 2 44.77+0.92= — × — = 8 + — = 4 3 5191-27= 10 1 10 41.6÷0.01= — ÷ — = — ÷ — = 9 2 9 569.6-7= 1680 ÷ 16 + 18 × 8 40%x + 11 = 49
5.3 + 4.4 + 4.7 + 5.6 0.25 × 0.32 × 12.5
8 : x = 32 : 0.5 5x + 0.5×2 = 6.5
( 1 — 1 7 2 + — + — )×64 4 8 1 — ÷ 18 + 6 — × 1 — 7 7 18 9 — × 2 — ÷ 9 — × 2 — 8 9 8 9 7 — : x = 8 — : 0.9 8 7 3 — + 5 — + 1 — + 1 — 4 6 4 6 4%x - 30 = 76 x - 7 — = 8 — 8 7 2 - 1 — - 6 — 7 7 6 — + 7 — + 1 — 5 4 5 5 — × 2 — × 6 — 6 19 5
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