bằng 3 nhé

= 2 nhé

chấm hỏi

= 2019 x 100

= 201900

2019 x 99 +2019 = 2019 x 99 + 2019 x 1

                            =2019 x ( 99 + 1 )

                            =2019 x 100

                            =201900

Số trang của 35 quyển sách Toán 4 là : 182 x 35 = 6370 ( trang )

ngu thế nhờ giờ này ko bt nhân

cho thẻ báo cáo vì đăng bài nt lm mà ko chịu lm

Đổi 32 cm = 3,2 dm

Chiều cao hình bình hành là : 8 : 3,2 = 2,5 ( dm )

=10 phải ko

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