Number (add/sub)

Hong Kong

Stage 1

Evaluate $600+90+7$600+90+7

Easy

< 1min

Evaluate $360+30+3$360+30+3.

Easy

< 1min

Find the value of $440+22+7$440+22+7.

Easy

< 1min

Evaluate $556+21+1$556+21+1.

Easy

< 1min

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