100 + 100 : 10 * 20 +70 = .................................
100 * 100 + 200 = .......................................
1111+1111+1111+1111+1111+1111+1111+1111+1111+1111 = ....................................................................
1111 * 10 = ................................................................
100 + 100 : 10 x 20 + 70 = 470
100 x 100 + 200 = 10 200
1111 + 1111 + 1111 + 1111+ 1111 + 1111 + 1111 + 1111 + 1111 + 1111 = 11 110
1111 x 10 = 11 110
Câu 1:100 + 100 :10 x 20 + 70=100+10x20+70=100+200+70=370
Câu 2:100 x 100+200=10 000+200=10 200
Câu 3:1111+1111+1111+1111+1111+1111+1111+1111+1111+1111=1111x10=11 110
Câu 4:1111x10=11 110