Green Bridge Learning Resource Nchekwa Maka Using A Calculator

Gbogbo ọrọ náà

A calculator is only as accurate as the person using it. Knowing how to enter a calculation correctly, use brackets and the power and root keys, and read the display sensibly is what turns a calculator from a source of mistakes into a reliable tool.

In this lesson you will use a calculator efficiently, enter values and operations in the right order, and interpret the display, including rounded answers and numbers shown in standard form.

Ayẹwo Ẹkọ

Ekele diri gi maka imecha ihe karịrị na Using A Calculator. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

What is the value of (12 + 8) ÷ 4? A. 5 B. 14 C. 10 D. 20 Answer: A
Entered without brackets, 12 + 8 ÷ 4 gives: A. 5 B. 14 C. 20 D. 6 Answer: B
The square root of (3^2 + 4^2) is: A. 5 B. 7 C. 12 D. 25 Answer: A
A calculator shows 3.2 x 10^5. This number is: A. 3.25 B. 32 000 C. 320 000 D. 3 200 000 Answer: C
Which is the best practice when using a calculator? A. Round at every step B. Avoid brackets C. Keep full accuracy until the end D. Estimate after, not before Answer: C