Question

Do all the sums mentally:
(a) 75 + 20 = $\boxed{{}^{}95}$

(b) 90 + 60 = $\boxed{{}^{}150}$

(c) 25 + 30 + 3 = $\boxed{{}^{}}$

(d) 9 + 40 + 31 = $\boxed{{}^{}}$

(e) 500 + 200 = $\boxed{{}^{}}$

(f) 400 + 350 = $\boxed{{}^{}}$

(g) 670 + 120 = $\boxed{{}^{}}$

(h) 380 + 210 = $\boxed{{}^{}}$

(i) 205 + 650 = $\boxed{{}^{}}$

(j) 128 + 600 = $\boxed{{}^{}}$

(k) 150 + 69 = $\boxed{{}^{}}$

(l) 37 + 46 + 3 = $\boxed{{}^{}}$

Answer 1

(a) 75 + 20 = $\boxed{{}^{}95}$

(b) 90 + 60 = $\boxed{{}^{}150}$

(c) 25 + 30 + 3 = $\boxed{{}^{}58}$

(d) 9 + 40 + 31 = $\boxed{{}^{}80}$

(e) 500 + 200 = $\boxed{{}^{}700}$

(f) 400 + 350 = $\boxed{{}^{}750}$

(g) 670 + 120 = $\boxed{{}^{}790}$

(h) 380 + 210 = $\boxed{{}^{}590}$

(i) 205 + 650 = $\boxed{{}^{}855}$

(j) 128 + 600 = $\boxed{{}^{}728}$

(k) 150 + 69 = $\boxed{{}^{}219}$

(l) 37 + 46 + 3 = $\boxed{{}^{}86}$