Sumas y restas hasta 20

1Calcula.

a)2+3=\begin{array}{c}\bigcirc\\\end{array}

b)

5+8=\bigtriangleup

c)

4+3=\begin{aligned}\bigcirc\end{aligned}

d)

2+7=\bigcirc

e)

9+8=\begin{array}{c}\\\end{array}

f)

6+4=\begin{array}{c}\\ \end{array}

g)

4+9=\begin{aligned}\bigtriangleup\end{aligned}

2Completa.

a)3+8=11

\rightarrow3+9=\bigcirc

b)6 +7 = 13

b)6 +7 = 13\rightarrow6+8=\textcircled{\quad}

c)2+9=11

c) \rightarrow3+9=\begin{array}{c}\end{array}

d)4 + 6 = 10

d)4 + 6 = 10\rightarrow5+6=\bigcirc

:3Resuelve.

9+9=\begin{aligned}\bigcirc\end{aligned}

6+6=\bigcirc

c=5+5=\frac{\sqrt{2}}{2}

2+2=\frac{2}{3}

e\times8+8=\bigcirc

f)\quad3+3=\quad\textcircled{\quad}

g)4+4=\bigtriangleup

9Completa.

a)

7+8=\begin{array}{c}\bigotimes\\\end{array}

b)

8+7=\begin{array}{c}\bigcirc\\\end{array}

c)

6+9=\begin{array}{c}\\ \end{array}

d)9+6=\begin{array}{c}\bigcirc\\\end{array}

Texto del Estudiante Pág. 1810 minutos

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