45-12, 24-10, 30+15, 29-15, 20-11, 11-10, 15-12, 25-15, 40-30, 4X6, 16+57, 70÷7, 7tens +........... ones= 78, 5X6, 9tens+ 5ones =, 21+45, 11 Tens 6 ones = ______ ones , 16+52, 9X9, 7X5, 10÷2, 10-5, 10+50, 60-10, 90-50, 7X7, 32+23, 12+12, 50÷5, 8X4, 1m= ______cm, 25-15, 1 week =___ days, 1 year=_______days, 12+5=_______, 15-2=______.

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