( 1 — 173+ — + — )×90 56 1 —÷ 15 + 8 —× 1 — 9 9151 —× 8 —÷ 1 —× 8 — 29291 — : x= 1 — : 0.7 5 5 1 —+ 1 —- 1 —+ 2 — 23238%x+19 = 75 x× 1 —= 4 — 33 5- 1 —- 2 — 339 —+ 1 —- 1 — 8383 —× 2 —× 4 — 453
7 13 1 1 — + — = — ÷ — = 2 2 8 2 17 2 1 — + — = 20% ÷ — = 3 3 6 3 1 1 8 — + — = — × — = 4 5 9 7 4 1 6 ÷ — = 6 × — = 3 8 1 1 1 — × — = 2 - — = 9 6 7 3 4 1 4 — ÷ — = — + — = 4 3 3 5 2691 ÷ 13 + 14 × 5 8%x 3.6+0.26= 54-48= 510+210= 28+80=840÷60=87+0.9=0.35×0.7= 3.8÷0.2= 5.8-0.7=3.8+0.26= 14÷0.07=1.6×0.8= + 27 = 76
7.5 + 4.5 + 2.5 + 5.5 2.5 × 32 × 0.125 8 : x = 10 : 7.5 9x + 0.5×2 = 8
( 1 — 5 5 2 + — + — )×48 4 6 1 — ÷ 48 + 5 — × 1 — 6 6 48 9 — × 8 — ÷ 9 — × 8 — 8 5 8 5 1 — : x = 3 — : 0.7 4 4 1 — + 1 — + 1 — + 2 — 2 3 2 3 16%x + 19 = 78 x ÷ 7 — = 1 — 8 3 4 - 1 — + 1 — 2 2 4 — + 7 — + 1 — 3 2 3 1 — × 2 — × 2 — 2 13 1
7 13 1 4714-26= — ÷ — = — + — = 6 6 8 394+37= 11 2 1 960-130= — - — = 65% ÷ — = 5 5 3 25+20= 2 1 1 1850÷50= — + — = — ÷ — = 3 7 2 371+0.5= 1 40.3×0.6= 6 × — = 8 × — =7 38.4÷0.4= 1 1 87.94-0.14= — + — = 3 × — = 3 3 93+0.16= 5 6 2 71.1×0.4= — ÷ — = — ÷ — = 4 7 3 6320-48= 1545 ÷ 15 + 43 × 5 50%x - 19 = 76
7.3 + 0.3 + 2.7 + 9.7 0.25 × 0.32 × 0.125
10 : x = 2 : 6.6 9x - 0.5×4 = 9.5
( 3 — 6 7 2 + — + — )×60 5 6 1 — ÷ 40 + 2 — × 1 — 3 3 40 9 — × 6 — ÷ 9 — × 6 — 4 5 4 5 3 — : x = 6 — : 0.7 4 7 2 — + 1 — + 1 — + 4 — 3 5 3 5 80%x - 23 = 58 x - 1 — = 9 — 6 8 2 - 1 — + 1 — 2 2 3 — + 1 — + 1 — 2 8 2 7 — × 2 — × 8 — 8 13 7
1 5 1 579.8+8= — + — = — ÷ — = 8 8 8 491+37= 13 1 1 930+490= — + — = 55% × — = 5 5 8 12+90= 4 1 1 1480÷40= — ÷ — = — ÷ — = 3 3 2 444+0.6= 4 50.35×0.9= 5 ÷ — = 8 - — =3 69.8÷0.2= 6 9 11.91+0.3= — + — = 4 + — = 5 8 61.2×0.9= 9 4 1 959.3+7= — × — = — × — = 8 5 8 8643-35= 1284 ÷ 12 + 48 × 9 32%x - 22 = 42
7.4 + 5.4 + 2.6 + 4.6 250 × 32 × 0.125
6 : x = 50 : 2.9 3x + 0.5×2 = 6.5
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