Toán Lớp 6: Bài 1: Tính hợp lí:
a) -234 + 16 – 34 + 200 + 64
b) 23.(-17) – 17.58 + (-19).17
c) 34.(73 – 83) – 83.(17 – 34) – 73.17
d) 1 – 2 – 3 + 4 – 5 – 6 + 7 – 8 – 9 +…+ 28 – 29 – 30.
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Toán Lớp 6: Bài 1: Tính hợp lí:
a) -234 + 16 – 34 + 200 + 64
b) 23.(-17) – 17.58 + (-19).17
c) 34.(73 – 83) – 83.(17 – 34) – 73.17
d) 1 – 2 – 3 + 4 – 5 – 6 + 7 – 8 – 9 +…+ 28 – 29 – 30.
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