1. 直接写出得数。
97 + 13 =
6 × 25 =
120 - 80 =
560 ÷ 7 ÷ 2 =
87 - 29 =
7.1 - 6.2 =
4.02 - 0.53 =
280 - 199 - 1 =
18 × 5 =
18.6 + 0.9 =
225 ÷ 15 =
5.7 - 4.3 + 3.6 =
540 ÷ 54 =
420 ÷ 21 =
70 × 80 =
45 × 5 ÷ 9 =
2.6 + 8 =
540 - 60 =
306 ÷ 9 =
99 × 99 + 99 =
490 ÷ 7 =
630 ÷ 30 =
700 × 13 =
276 - (45 + 76) =
85 × 20 =
440 ÷ 22 =
402 × 3 =
5 × 20 ÷ 5 × 20 =
906 ÷ 3 =
840 ÷ 6 =
291 ÷ 3 =
6.25 + 0.75 - 1.6 =
改
97 + 13 =
6 × 25 =
120 - 80 =
560 ÷ 7 ÷ 2 =
87 - 29 =
7.1 - 6.2 =
4.02 - 0.53 =
280 - 199 - 1 =
18 × 5 =
18.6 + 0.9 =
225 ÷ 15 =
5.7 - 4.3 + 3.6 =
540 ÷ 54 =
420 ÷ 21 =
70 × 80 =
45 × 5 ÷ 9 =
2.6 + 8 =
540 - 60 =
306 ÷ 9 =
99 × 99 + 99 =
490 ÷ 7 =
630 ÷ 30 =
700 × 13 =
276 - (45 + 76) =
85 × 20 =
440 ÷ 22 =
402 × 3 =
5 × 20 ÷ 5 × 20 =
906 ÷ 3 =
840 ÷ 6 =
291 ÷ 3 =
6.25 + 0.75 - 1.6 =
改
答案
1. 110 150 40 40
58 0.9 3.49 80
90 19.5 15 5
10 20 5600 25
10.6 480 34 9900
70 21 9100 155
1700 20 1206 400
302 140 97 5.4
58 0.9 3.49 80
90 19.5 15 5
10 20 5600 25
10.6 480 34 9900
70 21 9100 155
1700 20 1206 400
302 140 97 5.4
2. 计算下面各题,能简算的要简算。
3.05-0.67+2.48
540×14+46×140
(36+108)×12÷18
3.05-0.67+2.48
540×14+46×140
(36+108)×12÷18
答案
2. 4.86 14000 96
3. 计算下面梯形的面积。
(1)
(2)
(1)
(2)
答案
3. (1) (4+8)×5÷2=30(cm²)
(2) (4+6)×7÷2=35(dm²)
(2) (4+6)×7÷2=35(dm²)
如图(单位:厘米),将两个完全相同的直角梯形的一部分重叠在一起,涂色部分的面积是多少平方厘米?

答案
40-8=32(厘米)
(32+40)×16÷2=576(平方厘米)
(32+40)×16÷2=576(平方厘米)
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