Question

口算．3÷311= 18×49= 0÷9899= 4×15÷4×215= 415÷4= 21×57= 89×34= 36×(14+19)

口算．3÷311= 18×49= 0÷9899= 4×15÷4×215= 415÷4= 21×57= 89×34= 36×(14+19)=

Answer 1

3÷ 3 11 =11	1 8 × 4 9 = 1 18	0÷ 98 99 =0	4×15÷4× 2 15 =2
4 15 ÷4= 1 15	21× 5 7 =15	8 9 × 3 4 = 2 3	36×( 1 4 + 1 9 )=13．