Find the value of $57-19$57−19.

Easy

< 1min

Find the value of $58-29$58−29.

Easy

< 1min

Find the value of $98-49$98−49.

Easy

< 1min

Find the value of $63-48$63−48.

Easy

< 1min

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uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers