19．计算——青夏教育精英家教网——

摘要：19．计算

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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 □ = 3 ○ = 4

1. △ △ △ □ □ ○ ○ = _______________
2. ○ ○ ○ □ □ = ______________
3. △ ○ □ □ □ = ______________
4. △ △ △ △ □ ○ = ______________

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计算下面图形的边长之和。

1. _______________ 　2. _______________ 　 3. _______________ 　4. _______________

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计算下列算式，选择正确的答案。

(     ) 1. 50 － 35
(     ) 2. 20 + 30
(     ) 3. 27 + 18
(     ) 4. 49 － 12
(     ) 5. 40 － 14

A. forty-five
B. thirty-seven
C. fifteen
D. fifty
E. twenty-six

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计算，选择得数。

(     ) 1. What's seventeen plus fourteen?
(     ) 2. What's nine plus twelve?
(     ) 3. What's thirteen plus thirty-six?
(     ) 4. What's forty-one plus fourteen?
(     ) 5. What's twenty-five plus fifteen?

A. Forty-nine.
B. Fifty-five.
C. Thirty-one.
D. Forty.
E. Twenty-one.

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