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Ms. Lopez drew a line on the chalkboard that measures 40 cm. She erased 17 7/8 cm. How long was the remaining line?
pa answer po kailangan po ngayon ty po​


Sagot :

Answer:

22 1/8

Step-by-step explanation:

Ms. Lopez drew a 40 cm line and she erased 17 7/8cm.

erased = subtraction

40 - 17 7/8 =?

Add one as the denominator for 40.

40/1 - 17 7/8=?

Make the mixed fraction into a improper fraction.

8 x 17 = 136. 136 + 7 = 143. 143/

Find the LCD of 1 and 8, which is 8.

40/1 - 143/8 = 320/8 - 143/8= 177/8

Make 177/8 into a mixed fraction.

177/8 = 22 1/8