Вставь пропущенные числа.
Реши, как показано в образце.
Образец: 200 +100 = 2 сот. +1 сот. = 3 сот.
1000 – 100 = _______________________________
900 – 100 = ________________________________
900 +100 = _________________________________
400 +400 = _________________________________
500 +400 = _________________________________
800 – 200 = ________________________________
1000 – 800 = _______________________________
700 – 200 = ________________________________
700 +100 = _________________________________
300 +200 = _________________________________
400 – 100 = ________________________________
600 +300 = _________________________________
1000 – 500 = ______________________________
700 – 200 = ________________________________
600 – 100 = _______________________________
900 – 300 = ________________________________
200 +700 = _________________________________
500 +200 = _________________________________
900 – 100 = ________________________________
300 +300 = _________________________________
100 +200 = _________________________________
100 +300 = _________________________________
100 +400 = _________________________________
100 +500 = _________________________________
100 +600 = _________________________________
100 +700 =__________________________________
100 +800 = _________________________________
100 +900 = __________________________________
900 – 200 = _________________________________
800 – 200 = _________________________________
700 – 200 = __________________________________
600 – 200 = __________________________________
500 – 200 = __________________________________
300 – 200 = __________________________________
