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048_G3U5_G4U10_˙—» ¿º 2011.3.22 8:30 PM ˘ ` 44 PDF_In 2540DPI 150LPI T
Activity 1 Addition and Subtraction of 3 Numbers
1 . Learn to add and subtract 3 numbers.
2,381 1,884 2,527 1,738 2,381 2,381
4,265 1,884 2,527
1,738
When there are addition and subtraction, calculate the numbers from
left to right.
a. b.
2,381 1,884 3,527 4 ,148 2,706 1,583
2,381 2,381 4 ,1 4 8 2,381
1,884 3,527 2,706 1,583
c. d.
7,000 1,865 2,314 8,235 5,037 1,649
7, 0 0 0 2 , 36,18315 8,235 2,381
,1 , 8 6 5 2,314 5,037 1,649
6,135 5,547
44
Activity 1 Addition and Subtraction of 3 Numbers
1 . Learn to add and subtract 3 numbers.
2,381 1,884 2,527 1,738 2,381 2,381
4,265 1,884 2,527
1,738
When there are addition and subtraction, calculate the numbers from
left to right.
a. b.
2,381 1,884 3,527 4 ,148 2,706 1,583
2,381 2,381 4 ,1 4 8 2,381
1,884 3,527 2,706 1,583
c. d.
7,000 1,865 2,314 8,235 5,037 1,649
7, 0 0 0 2 , 36,18315 8,235 2,381
,1 , 8 6 5 2,314 5,037 1,649
6,135 5,547
44
