( 1 — 682+ — + — )×90 59 1 —÷ 46 + 2 —× 1 — 3 3469 —× 4 —÷ 9 —× 4 — 65651 — : x= 1 — : 0.4 6 7 7 —+ 4 —- 1 —+ 1 — 85858%x+12 = 76 x- 1 —= 1 — 76 8- 1 —- 1 — 223 —+ 7 —- 1 — 2227 —× 2 —× 8 — 837
5 11 1 13-0.63= — + — = — × — = 4 4 3 898+42= 19 1 1 590-130= — + — = 45% × — = 9 9 2 21×90= 7 1 1 2770÷70= — ÷ — = — ÷ — = 6 3 8 321+0.5= 7 80.2×0.8= 4 - — = 7 - — =6 75.8÷0.1= 7 1 98.56+0.34= — + — = 7 ÷ — = 6 4 83.6+0.25= 7 1 1 89-0.84= — × — = — ÷ — = 8 5 7 97.6÷0.04= 3654 ÷ 18 + 97 × 5 80%x + 18 = 36
4.9 + 1.1 + 5.1 + 8.9 2.5 × 0.32 × 0.125
4 : x = 50 : 2.6 8x + 0.5×6 = 6.5
( 4 — 5 10 3 + — + — )×108 4 9 1 — ÷ 24 + 2 — × 1 — 3 3 24 5 — × 4 — ÷ 5 — × 4 — 6 7 6 7 1 — : x = 1 — : 0.7 8 3 7 — + 2 — + 1 — + 1 — 8 3 8 3 40%x + 19 = 46 x - 9 — = 1 — 8 7 9 - 1 — + 5 — 6 6 9 — + 5 — + 1 — 8 2 8 2 — × 2 — × 3 — 3 17 2
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