MathematicsBeginner

Two-digit numbers with ones and tens

Line up the place values

Estimated time · 7 min 9 Content blocks

Core concepts

Formulas

23+4=27,23+40=63,27−4=23,63−40=2323+4=27,\qquad 23+40=63,\qquad 27-4=23,\qquad 63-40=23

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Exercises

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Prerequisites

Adding and subtracting whole tens6 min
Practice set
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