摘要：5．计算 = .
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| 计算。 | |
2. ○ ○ ○ □ □ = ______________ 3. △ ○ □ □ □ = ______________ 4. △ △ △ △ □ ○ = ______________ |
O = _____________ K = _____________计算，并填写表示数字的单词。
1. twenty + thirty = _________________
2. fifty － ten = _________________
3. five × seven = _________________
4. fifty ÷ five = _________________
5. fifty － one － twenty + twelve = _________________
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2. fifty － ten = _________________
3. five × seven = _________________
4. fifty ÷ five = _________________
5. fifty － one － twenty + twelve = _________________
计算下面图形的边长之和。
1. _______________ 2. _______________ 3. _______________ 4. _______________
| 计算下列算式，选择正确的答案。 | ||
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