Question

Show how to make one addend the next ten number. complete the new addition sentence.
6) 18+3=___ ___+___=___


7) 27+24=___ ___+___=___

Answer 1

18+3 = 20 + 1 = 21

27 + 4 = 30 + 1 = 31

practice by drawing the problem on a number line.