計算下列算術題，并用英語表達出來

Example: 12＋8＝20

Twelve and eight is twenty.

1.10＋ 30 ＝40

__________________________

2.50＋20＝ 70

__________________________

3. 40 ＋20＝60

__________________________

4.30＋50＝ 80

__________________________

5. 80 ＋10＝90

__________________________

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