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1. 直接写出得数。
840 - 660 = 74 + 198 = 930 - 405 = 3200 + 1800 - 1500 =
696 ÷ 6 = 50 × 46 = 768 ÷ 8 = 100 - 45 × 2 =
70 × 16 = 102 × 7 = 216 ÷ 6 = 136 - (36 - 24) =
90 × 36 = 22 + 178 = 101 × 8 = 35 + 5 × 12 =
402 × 5 = 60 × 35 = 104 ÷ 4 = 180 - 180 ÷ 6 =
288 ÷ 8 = 230 ÷ 5 = 13 × 60 = 25 × 4 × 6 =
2100 + 900 = 860 ÷ 2 = 40 + 99 = (70 - 35) × 4 =
540 ÷ 3 = 450 × 3 = 78 × 4 = 360 ÷ 9 - 9 =
840 - 660 = 74 + 198 = 930 - 405 = 3200 + 1800 - 1500 =
696 ÷ 6 = 50 × 46 = 768 ÷ 8 = 100 - 45 × 2 =
70 × 16 = 102 × 7 = 216 ÷ 6 = 136 - (36 - 24) =
90 × 36 = 22 + 178 = 101 × 8 = 35 + 5 × 12 =
402 × 5 = 60 × 35 = 104 ÷ 4 = 180 - 180 ÷ 6 =
288 ÷ 8 = 230 ÷ 5 = 13 × 60 = 25 × 4 × 6 =
2100 + 900 = 860 ÷ 2 = 40 + 99 = (70 - 35) × 4 =
540 ÷ 3 = 450 × 3 = 78 × 4 = 360 ÷ 9 - 9 =
答案
1. 180 272 525 3500
116 2300 96 10
1120 714 36 124
3240 200 808 95
2010 2100 26 150
36 46 780 600
3000 430 139 140
180 1350 312 31
116 2300 96 10
1120 714 36 124
3240 200 808 95
2010 2100 26 150
36 46 780 600
3000 430 139 140
180 1350 312 31
2. 计算下面各题。
32 × 42 + 168 25 × (156 - 98) (603 - 479) ÷ 4
48 × 15 ÷ 6 710 - 28 × 17 216 + 189 ÷ 7
32 × 42 + 168 25 × (156 - 98) (603 - 479) ÷ 4
48 × 15 ÷ 6 710 - 28 × 17 216 + 189 ÷ 7
答案
2. 1512 1450 31
120 234 243
120 234 243
如图，已知∠1 = ∠2 = ∠3 = ∠4 = ∠5 = ∠6，图中所有锐角的度数和是多少度？
答案
·思维提升
180°÷6=30°
30°×6=180°
30°×2×5=300°
180°+300°=480°
180°÷6=30°
30°×6=180°
30°×2×5=300°
180°+300°=480°
