Giải vở bài tập Toán 7 chương II: Hướng dẫn sử dụng máy tính bỏ túi casio
Hướng dẫn Giải vở bài tập Toán 7 chương II: Hướng dẫn sử dụng máy tính bỏ túi casio
Bài 1.
a) Đầu tiên ta tính trong ngoặc trước: 3/7 + 4/5 + 2/3 được một số sau đó ta lại: x 5/3 = kết quả.
b) Đầu tiên ta tính trong ngoặc trước: 4/5 + 5/6 + 6/7 được một số sau đó lại: x 3/2 = kết quả.
c) Tính trong ngoặc đầu tiên ra kết quả nhấn phím M+; tính trong ngoặc thứ hai bằng bao nhiêu rồi nhấn phím nhân và nhấn phím MR sau đó nhấn phím bằng.
Cụ thể: 1 /2+3/4+4/5 nhấn M+; nhấn 2/3+4/5+6/7 x rồi nhấn MR sau đó nhấn = ta được kết quả.
Bài 2.
Để tính chính xác đến 0,01, nghĩa là kết quả chỉ có hai chữ số ở phần thập phân, trước khi tính toán ta phải ấn
(màn hình hiện số 0,00)
a)
= 
= 
= 0,73
b)
=
= 2,09
Bài 3.
a) Đầu tiên ta tính trong ngoặc trước: 3/7 + 4/5 + 2/3 được một số sau đó ta lại: x 5/3 = kết quả.
b) Đầu tiên ta tính trong ngoặc trước: 4/5 + 5/6 + 6/7 được một số sau đó lại: x 3/2 = kết quả.
c) Tính trong ngoặc đầu tiên ra kết quả nhấn phím M+; tính trong ngoặc thứ hai bằng bao nhiêu rồi nhấn phím nhân và nhấn phím MR sau đó nhấn phím bằng.
Cụ thể: 1 /2+3/4+4/5 nhấn M+; nhấn 2/3+4/5+6/7 x rồi nhấn MR sau đó nhấn = ta được kết quả.
Bài 2.
Để tính chính xác đến 0,01, nghĩa là kết quả chỉ có hai chữ số ở phần thập phân, trước khi tính toán ta phải ấn
(màn hình hiện số 0,00)a)
= = = 0,73b)
= = 2,09Bài 3.
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