1. 直接写出得数。
98 + 101 =
100 - 45 =
132 - 97 =
4.3 + 2.2 + 3.1 =
10.6 - 8.4 =
4.9 + 0.9 =
2.65 - 1.56 =
200 × 5 ÷ 10 =
19 × 20 =
8.6 - 0.65 =
607 - 598 =
430 × 2 × 5 =
58 - 47 =
28 × 50 =
128 × 20 =
700 ÷ 10 ÷ 2 =
23 × 20 =
200 ÷ 4 =
22 × 40 =
5.2 + 1.8 - 4 =
520 ÷ 40 =
180 ÷ 90 =
445 ÷ 5 =
484 ÷ 11 + 6 =
30 × 18 =
2.5 + 3 =
820 ÷ 41 =
872 - 136 - 64 =
30 × 400 =
85 × 40 =
530 ÷ 5 =
58 × 14 - 38 × 14 =
98 + 101 =
100 - 45 =
132 - 97 =
4.3 + 2.2 + 3.1 =
10.6 - 8.4 =
4.9 + 0.9 =
2.65 - 1.56 =
200 × 5 ÷ 10 =
19 × 20 =
8.6 - 0.65 =
607 - 598 =
430 × 2 × 5 =
58 - 47 =
28 × 50 =
128 × 20 =
700 ÷ 10 ÷ 2 =
23 × 20 =
200 ÷ 4 =
22 × 40 =
5.2 + 1.8 - 4 =
520 ÷ 40 =
180 ÷ 90 =
445 ÷ 5 =
484 ÷ 11 + 6 =
30 × 18 =
2.5 + 3 =
820 ÷ 41 =
872 - 136 - 64 =
30 × 400 =
85 × 40 =
530 ÷ 5 =
58 × 14 - 38 × 14 =
答案
1. 199 55 35 9.6
2.2 5.8 1.09 100
380 7.95 9 4300
11 1400 2560 35
460 50 880 3
13 2 89 50
540 5.5 20 672
12000 3400 106 280
2.2 5.8 1.09 100
380 7.95 9 4300
11 1400 2560 35
460 50 880 3
13 2 89 50
540 5.5 20 672
12000 3400 106 280
2. 计算下面各题,能简算的要简算。
$73×101 - 73$
$300 - 17×11 - 70$
$634 + 352 - 34 + 148$
$39.1 - 10.42 - 5.3$
$(841 - 41)÷25÷4$
$36÷[936÷(35 + 17)]$
$73×101 - 73$
$300 - 17×11 - 70$
$634 + 352 - 34 + 148$
$39.1 - 10.42 - 5.3$
$(841 - 41)÷25÷4$
$36÷[936÷(35 + 17)]$
答案
2. 7300 43 1100
23.38 8 2
23.38 8 2
在如图(单位:米)的正方形中,涂色部分的面积之和是多少公顷?

答案
600×500÷2×2=300000(平方米) 300000平方米=30公顷
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