38 - 23+15=, 79 - 67+12=, 68 - 45+23=, 89 - 71+18=, 94 - 32+62=, 109 - 84+25=, 92 - 58+34=, 53 - 21+32=, 87 - 74+13=, 97 - 64+33=,

Addition using double digit numbers

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