( 1 — 592+ — + — )×64 48 1 —÷ 54 + 6 —× 1 — 7 7547 —× 2 —÷ 7 —× 2 — 25253 — : x= 7 — : 0.3 4 6 7 —+ 1 —- 1 —+ 1 — 828225%x+ 11= 72x÷ 3 —= 2 — 43 4- 1 —- 4 — 555 —+ 7 —+ 1 — 4445 —× 2 —× 6 — 635
7 13 1 1 — ÷ — = — + — = 8 8 9 2 16 2 7 — ÷ — = 45% ÷ — = 7 7 6 3 2 1 6 — ÷ — = — + — = 4 3 2 5 6 1 3 + — = 8 + — = 5 6 2 1 1 — ÷ — = 3 + — = 3 5 7 7 1 7 7 — + — = — ÷ — = 8 7 8 8 2912 ÷ 14 + 85 × 6 8%x 6+0.73=61+21= 840-420= 12+10=630÷30=20-0.2=0.55×0.2= 3.6÷0.1= 3.04-0.23=6÷0.02=8+0.18=9+0.57= - 15 = 72
1.3 + 3.1 + 8.7 + 6.9 25 × 0.32 × 1.25 6 : x = 20 : 7.5 7x - 0.5×2 = 7
( 2 — 6 8 3 + — + — )×135 5 9 1 — ÷ 18 + 1 — × 1 — 2 2 18 5 — × 8 — ÷ 5 — × 8 — 4 3 4 3 3 — : x = 1 — : 0.1 4 3 8 — + 1 — + 1 — + 8 — 9 9 9 9 16%x - 30 = 54 x ÷ 4 — = 5 — 3 6 5 - 1 — - 4 — 5 5 10 — + 7 — + 1 — 9 6 9 7 — × 2 — × 8 — 8 13 7
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