Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
9 × 10 = ______
55 + 20 = ______
28 − 10 = ______
74 + 20 = ______
18 + 10 = ______
76 + 20 = ______
15 + 20 = ______
69 − 10 = ______
79 + 10 = ______
4 × 10 = ______
1 × 10 = ______
45 − 10 = ______
44 + 20 = ______
15 + 10 = ______
8 × 10 = ______
68 + 10 = ______
29 − 10 = ______
90 − 10 = ______
70 + 10 = ______
75 − 10 = ______
