( 3 — 192+ — + — )×80 58 1 —÷ 23 + 2 —× 1 — 3 3239 —× 2 —÷ 9 —× 2 — 25251 — : x= 1 — : 0.1 8 4 2 —+ 7 —+ 1 —+ 1 — 383825%x- 22= 49x÷ 2 —= 6 — 37 7- 1 —+ 7 — 888 —+ 1 —+ 1 — 7379 —× 2 —× 10 — 1039
5 5 1 12+0.31= — ÷ — = — × — = 4 4 2 552-22= 11 8 1 830-360= — + — = 15% × — = 3 3 2 22+80= 7 8 1 1770÷70= — ÷ — = — ÷ — = 8 7 6 511-0.3= 2 10.25×0.4= 7 + — = 2 - — =3 53÷0.2= 1 1 94.24+0.34= — ÷ — = 9 ÷ — = 8 7 829.8+4= 5 4 6 179.5-6= — + — = — ÷ — = 6 3 7 91.7×0.6= 1854 ÷ 18 + 65 × 9 25%x + 30 = 69
4.3 + 7.2 + 5.7 + 2.8 25 × 32 × 1.25
10 : x = 80 : 7.2 2x + 0.5×7 = 8
( 1 — 6 7 2 + — + — )×60 5 6 1 — ÷ 33 + 8 — × 1 — 9 9 33 1 — × 6 — ÷ 1 — × 6 — 8 7 8 7 7 — : x = 5 — : 0.1 8 4 2 — + 1 — + 1 — + 3 — 3 4 3 4 32%x - 30 = 75 x × 7 — = 1 — 6 8 6 - 1 — + 7 — 8 8 5 — + 7 — + 1 — 4 2 4 2 — × 2 — × 3 — 3 11 2
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