368 + 100 =, 489, 468, 728 - 100 =, 600, 628, 37 + 90 =, 127, 117, 562 - 90 =, Take off 100 then add ten on, Take off 100 then take 10 more off, 534 + 400 =, 900, 934, 506 - 300 =, 206, 260, 846 + 759 =, 1605, 1065, 4 x 7 =, 28 , 21, 32 ÷ 8 =, 3, 4, 45 ÷ 5 = , 8, 9.

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