★287+465=
★702-48=
608×5=
360×5=
4×246=
①4×9=36 ②44×9≈396 ③444×9=3996④4444×9=39996
⑤44444×9=..... ⑥×9=39999996
60×20= 0÷36= 7.2+2.87= 908﹣303≈ =